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MAX5491 Dataheets PDF



Part Number MAX5491
Manufacturers Maxim
Logo Maxim
Description Precision-Matched Resistor-Divider in SOT23
Datasheet MAX5491 DatasheetMAX5491 Datasheet (PDF)

19-3009; Rev 3; 12/04 Precision-Matched Resistor-Divider in SOT23 MAX5491 General Description The MAX5491 precision resistor-divider consists of two accurately matched resistors with access to the ends and center of the divider. This device offers excellent resistance matching of 0.035% (A grade), 0.05% (B grade), and 0.1% (C grade). The MAX5491 includes an extremely low resistance-ratio temperature drift of 2ppm/°C over -40°C to +85°C, and has an end-to-end resistance of 30kΩ. Resistance ratio.

  MAX5491   MAX5491


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19-3009; Rev 3; 12/04 Precision-Matched Resistor-Divider in SOT23 MAX5491 General Description The MAX5491 precision resistor-divider consists of two accurately matched resistors with access to the ends and center of the divider. This device offers excellent resistance matching of 0.035% (A grade), 0.05% (B grade), and 0.1% (C grade). The MAX5491 includes an extremely low resistance-ratio temperature drift of 2ppm/°C over -40°C to +85°C, and has an end-to-end resistance of 30kΩ. Resistance ratios from 1:1 to 30:1 are available. Ten standard ratios are available (see Table 1), and custom ratios are also available upon request. To enhance device and system robustness, the MAX5491 also features ±2kV Human Body Model electrostatic discharge (ESD) protection to ensure against real-world ESD events. The MAX5491 is ideal for precision gain-setting applications where tight resistance matching and low temperature drift are necessary. The MAX5491 is available in a space-saving 3-pin SOT23 package, and is guaranteed over the extended -40°C to +85°C temperature range. ♦ Resistance Ratios from 1:1 to 30:1 ♦ Custom Ratios Available Upon Request ♦ ±2kV Human Body Model ESD Protection ♦ Tight Initial Ratio Accuracy 0.035% (MAX5491A) 0.05% (MAX5491B) 0.1% (MAX5491C) ♦ Low 2ppm/°C Resistor-Ratio-Drift ♦ Up to 50V Operating Voltage Across Sum of R1 and R2 ♦ Tiny 3-Pin SOT23 Package Features Applications Industrial Process Control Instrumentation Precision Gain Setting Medical Equipment Automatic Test Equipment Base Stations PART Ordering Information* TEMP RANGE RATIO PINACCURACY PACKAGE (%) 0.035 0.05 0.1 MAX5491_A_ _ _ _ _ -T -40°C to +85°C 3 SOT23-3 MAX5491_B_ _ _ _ _ -T -40°C to +85°C 3 SOT23-3 MAX5491_C_ _ _ _ _ -T -40°C to +85°C 3 SOT23-3 *See the How to Order section for more details. Block Diagram TOP VIEW P1 Pin Configuration MAX5491 R1 P3 R2 P2 2 P1 1 MAX5491 3 P3 P2 SOT23 ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Precision-Matched Resistor-Divider in SOT23 MAX5491 ABSOLUTE MAXIMUM RATINGS Voltage Between P1 and P2...................................................50V Continuous Current into Any Pin....................................±1.75mA Continuous Power Dissipation (TA = +70°C) 3-Pin SOT23 (derate 7.1mW/°C above +70°C).........571.4mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS (TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Initial Resistor Ratio Error (Note 2) SYMBOL CONDITIONS MAX5491_A, TA = +25°C MAX5491_B, TA = +25°C MAX5491_C, TA = +25°C Resistance-Ratio Temperature Coefficient (Note 3) Absolute Temperature Coefficient of Resistance Voltage Coefficient of Resistance End-to-End Resistance (R1 + R2) Continuous Current Continuous Working Voltage Between P1 and P2 Power Rating Pin Capacitance Resistance Ratio Long-Term Stability 2000hr at +70°C 2 ±0.03 VP1-P2 IR1, IR2 0 TCR VCR 1:1 ≤ ratio ≤ 3.2:1 3.2:1 < ratio ≤ 10:1 10:1 < ratio ≤ 30:1 (Note 4) (Note 5) 28.5 2 4 5.5 35 0.1 30 31.5 ±1.75 50 87.5 ppm/°C ppm/V kΩ mA V mW pF % ppm/°C MIN TYP MAX ±0.035 ±0.05 ±0.1 % UNITS Note 1: The MAX5491 is 100% production tested at TA = +25°C. Specifications over -40°C to +85°C are guaranteed by design. Note 2: Testing conditions: TA = +25°C, VP1-P2 = 9V and 50V. Note 3: Resistance-ratio temperature coefficient is defined as ⎛R ⎞ ∆⎜ 1 ⎟ ⎝ R2 ⎠ R1 × ∆T R2 Note 4: Absolute TCR is defined as and is tested at 9V and 50V. (R1 + R2 ) × ∆ T ⎛R ⎞ ∆⎜ 1 ⎟ ⎝ R2 ⎠ R1 × ∆V R2 ∆(R1 + R2 ) Note 5: Resistance-ratio voltage coefficient is defined as 2 _______________________________________________________________________________________ Precision-Matched Resistor-Divider in SOT23 Typical Operating Characteristics (VP1-P2 = 10V, TA = +25°C, unless otherwise noted.) MAX5491 NORMALIZED RESISTOR-RATIO DRIFT vs. TEMPERATURE MAX5491 toc01 NORMALIZED RESISTOR-RATIO DRIFT vs. TEMPERATURE 300 200 RATIO DRIFT (ppm) 100 0 -100 -200 -300 -400 VP1-P2 = 10V RATIO = 5:1 MAX5491 toc02 400 300 200 RATIO DRIFT (ppm) 100 0 -100 -200 -300 -400 -50 -25 0 25 50 75 VP1-P2 = 10V RATIO = 1:1 400 100 -50 -25 0 25 .


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